Plot: When Sondra and Elvin announce their engagement, Clair and the children use the news to play a practical joke on Cliff, who launches a counter-offensive of his own. Geoffrey Owens as Elvin

The Cosby Show - Season 3 - I Know That You Know (Episode 21)
Episode Aired On:
Thursday, March 19 1987
37 years ago
Thursday, March 19 1987
37 years ago